In your textbook, read about chemical bonds.
Complete the table below by writing the type or types of chemical bond found in the type of matter
on the left. Use the following types of chemical bonds: covalent, ionic, metallic.
Matter
Type of Chemical Bond Present
13. Molecule
14. Hydrogen gas (H2)
15. Magnesium oxide (Mgo)
16. Metal
17. Table salt (NaCl)
18. Sodium monoxide (Na,0)
19. Water

Answer:

A function that is not characteristic of lipids is forming the exoskeleton of insects.

Explanation:

The exoskeleton is a rigid external structure that provides support and protection to animals such as insects.

The structure of exoskeletons is formed, especially in insects, by chitin. Chitin in turn is made up of N-acetyl-glucosamine, which when polymerized forms the hard and resistant layer that forms the external cover of the insects. Exoskeletons do not contain lipids in their composition.

The other options are correct with respect to the function of the lipids:

    B. Hydroxy fatty acid form the waxy layer that covers the leaves of the plants.

    C. Lipids are a reserve energy source, stored in the fatty cells.

    D. Phospholipids are the main component of cell membranes.

Answer:

The movement of molecules across a membrane without the input of energy is known as passive transport. When energy (ATP) is needed, the movement is known as active transport. Active transport moves molecules against their concentration gradient, from an area of low concentration to an area of high concentration

Explanation:

Answer:

The ice caps located at both poles contain 30 percent of Earth’s water.

Explanation:

Explanation:

D.Both a and B

As organisms with small population and those who migrate and need special habitat are most in danger of extinction.

The group of organisms that are in danger of extinction is those that have small populations and those that migrate or need special habits. So the correct option is D.

In biology, extinction refers to the extinction or death of a species. Extinction happens when a species' numbers are reduced due to evolutionary changes in its members, such as genetic inbreeding, poor reproduction, and population decline, or due to environmental factors like habitat fragmentation, climate change, natural disasters, and overexploitation of the species for human use.

The majority of species that have ever existed on Earth have gone extinct, but the fossil record indicates five very significant extinctions, known as mass extinction events, each of which resulted in the extinction of enormous numbers of species. The bulk of extinctions, which happen continuously and are described as background extinctions, are separated from these glaring decreases in the variety by the term "mass extinction."

Therefore, the correct option is D.

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Answer:

enzyme activity is affected by many factors such as temperature, concentration and ph  note that enzymes work best within a certain ph ranges

Explanation:

Answer:

Active transport uses ATP and moves substances against the concentration gradient; facilitated diffusion does not.

Explanation:

Active transports moves against the concentration gradient (hence why it needs energy or ATP to do so, its going "against the grain"). Facilitated diffusion does not require ATP but does something require carrier proteins during passive transport.

Answer:

[tex]\boxed {\tt 3}[/tex]

Explanation:

An element only has one type of atom and cannot be broken down by chemical means.

Let's analyze the answer choices.

1. This has two types of atoms, so it cannot be an element. It has more than one type of atom.

2. This has two types of atoms that are bonded together. It cannot be an element because there is more than one type of atom and the bonds can be broken.

3. This has one type of atoms, so it is an element.  

Therefore the best answer choice is 3.

Answer:

Examples of lipids include fats, oils, waxes, certain vitamins

The functions of lipids include storing energy, signaling, and acting as structural components of cell membranes.

The nucleus is present in the cell body.

Nerve cell is a basic unit of communication. Each nerve cell contains axon, cell body, dendrites and terminal branches. There are about 85 to 200 billion neurons present.

Neurons are of different types:

Neurons are the chemical messenger. They contain nucleus which contain genetic material. Mitochondria produces energy. Neurons contain specialized structures and chemicals. They contain some specialized structures (synapse) and chemicals called neurotransmitter.

Therefore, The nucleus is present in the cell body.

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Answer/Explanation:

These are examples of homologous structures. These are derived from common ancestors , however, they do not necessarily perform the same function. A good example is the vertebrate forelimbs like the ones shown here.

These limbs all have the same basic pattern of bones. They inherited this pattern from a common ancestor, but they now have different functions. This is an example of divergent evolution

Answer:

Hope it help you

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Explanation:

1/4 : 25%

3/4 : 75%

4/4 : 100%

2/4 : 50%

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Answer:

The electrons that are available to form bonds are known as valence electrons.

Explanation:

The electrons that are available to form bonds are known as valence electrons. I hope this answer is helpful.

The type of electron available to form bonds is a valence electron

Valence electrons are the electrons in the outermost energy level or shell of an atom. These electrons are involved in the formation of chemical bonds between atoms.

Valence electrons are responsible for determining the chemical properties and reactivity of an element. When atoms come together to form chemical bonds, they do so by sharing, gaining, or losing valence electrons. The interaction of valence electrons between atoms allows for the formation of covalent bonds, ionic bonds, or metallic bonds, depending on the specific circumstances.

Therefore, valence electrons are crucial in the process of bonding between atoms.

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Answer:

10.8 amu

Explanation:

11 * 0.80 = 8.8 (11 represents ion, 0.80 represents %)

10 * 0.20 = 2 (10 represents ion, 0.20 represents %)

8.8 + 2 = 10.8 amu

Answer/Explanation:

The Golgi body is a system of flattened sacs that is involved in the packaging, modification, and transport of proteins. It is particularly important for proteins that have to be transported outside of the cell.

Proteins from the Golgi that are to leave the cell are transported in vesicles. When they reach the membrane, the vesicles fuse with it and release the proteins outside of the cell

Answer:

The Meat?

Explanation:

Answer:

Because carnivores cannot produce energy directly from the sun, they must eat other animals that eat plants, and acquire energy, either directly or indirectly, from glucose. Hope this helps you

Answer:

A. Carbon dioxide

B. Light energy

C. Oxygen

D. Glucose

E. Water

Explanation:

The  model for photosynthesis is the sun in the form of solar energy where the carbon dioxide along with gets formed in  the leaves where it is kitchen  of the leaves along with the carbon dioxide gets removed out.

The primary source of energy is the sun which will help in the production of biomass.

A. Carbon dioxide

B. Solar energy

C. Oxygen

D. Stomata

The photosynthesis is the unit where the solar energy is the producers energy used by the producers. Carbon dioxide is the gas that is the used to the plants that is synthesizing plants food.

Leaves have the stomata where the food is being synthesized  where the chlorophyll containing pigment is helpful in making where the food is being synthesized.

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Answer:

a facilitated diffusion

Sorry If I'm wrong

Answer:

Membrane

Explanation:

The cellular membrane is composed of lipids, phospholipids, cholesterol, carbohydrates, and proteins.

Answer:

The membrane

Answer: The water cycle is called the hydrologic cycle. In the hydrologic cycle, water from oceans, lakes, swamps, rivers, plants, and even you, can turn into water vapor. Water vapor condenses into millions of tiny droplets that form clouds. Clouds lose their water as rain or snow, which is called precipitation

hope it helps!!

Explanation:

Answer: archaea

Explanation:

Most extremophiles are microorganisms (and a high proportion of these are archaea), but this group also includes eukaryotes such as protists (e.g., algae, fungi and protozoa) and multicellular organisms. Archaea is the main group to thrive in extreme environments.

Archaea domain includes organisms that are called extremophiles (organisms which live in extreme environments).

Archaea is a domain of single-celled organisms. These microorganisms lack cell nuclei and are therefore prokaryotes. Archaea were initially classified as bacteria, receiving the name archaebacteria.

The common characteristics of Archaebacteria known to date are these: (1) the presence of characteristic tRNAs and ribosomal RNAs; (2) the absence of peptidoglycan cell walls, with in many cases, replacement by a largely proteinaceous coat.

If there is an overgrowth of another organism called Archaea, then the symptom picture can be very different. There can still be bloating, abdominal pain and cramping, but Archaea usually cause constipation, not diarrhea.

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Answer:

Bacteria

Explanation:

Answer:

Bacteria

Explanation:

Bacteria is the most common prokaryotic cell. Hope this helps!

Answer:

D. Change occurs according to the needs of an individual organism to survive.

Answer:

Chemical properties of the alkali metals

Atoms of group 1 elements all have one electron in their outer shell. This means that the alkali metals all have similar chemical properties.

Reactions with water

The alkali metals react with water to produce a metal hydroxide and hydrogen. For example, sodium reacts with water:

Sodium + water → sodium hydroxide + hydrogen

2Na(s) + 2H2O(l) → 2NaOH(aq) + H2(g)

Sodium hydroxide is an alkali. It is a base that dissolves in water to form an alkaline solution. This solution:

has a pH greater than 7

turns universal indicator solution blue or purple

Hydrogen gas is also produced. With very reactive metals such as potassium, the energy of the reaction causes the hydrogen to burn as the reaction takes place.

Explanation:

Answer:

potassium reacts rigorously with cold water. potassium is a soft metal. we can predict that potassium is a highly reactive metal.

Explanation:

hope this helps

The organelle that would you expect to find in plant cells but not in animal cells is chloroplasts, second option is correct.

Through the processes of photosynthesis and oxygen release, chloroplasts provide energy that supports plant growth and crop yield. As a result, active substances such amino acids, phytohormones, nucleotides, secondary metabolites are produced by chloroplasts.

Organelles found in plant cells called chloroplasts use the photosynthetic process to change light energy into relatively stable chemical energy. They maintain life on Earth in this way. For plant cells, chloroplasts also perform a variety of metabolic processes, such as the creation of fatty acids, membrane lipids,

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Answer: A single change at a cellular level can change the way our entire body reacts, functions, and develops. Maintaining homeostasis is vital for our bodies to preform its necessary functions, without constant balance our bodies are unable to properly preform consequently, resulting in sickness and even death.

Explanation:

I used my biology book.

The body has different levels of organization based on structures and functions. The cellular level is the smallest and the basic level of the organization that consists of cells that are capable of division.

A single change at a cellular level can impact the entire body as:

Therefore, a single change at the cellular level can alter the entire body.

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Answer: B. Transfer RNA

Explanation:

Answer:

A.

Explanation:

Criticizing would be the downfalls of the edible vaccines. That means A is the only good thing there. Therefore, A is not criticism of edible vaccines.